Showing 2002Show all

198 papers · 1 filter

hep-ex2002★ 1 cited

Charged-Current Disappearance Measurements in the NuMI Off-Axis Beam

R. H. Bernstein

This article studies the potential of combining charged-current disappearance measurements of ν_μ to ν_τ from MINOS and an off-axis beam. I find that the error on Δm^2 from a 100 k…

astro-ph2002★ 82 cited

Clusters and Superclusters in the Sloan Digital Sky Survey

J. Einasto, G. H"utsi, M. Einasto +5

Two-dimensional high-resolution density field of galaxies of the Early Data Release of the Sloan Digital Sky Survey with a smoothing lengths 0.8 h^{-1} Mpc is applied to extract cl…

astro-ph2002★ 5 cited

The New Cosmology: Mid-term Report Card for Inflation

Michael S. Turner

Inflation has been the driving idea in cosmology for two decades and is a pillar of the New Cosmology. The inflationary paradigm has now passed its first round of significant tests…

hep-ph2002★ 44 cited

Grand Unification in Higher Dimensions

Lawrence J. Hall, Yasunori Nomura

We have recently proposed an alternative picture for the physics at the scale of gauge coupling unification, where the unified symmetry is realized in higher dimensions but is brok…

hep-ph2002★ 39 cited

The Photon Spectrum in Upsilon Decays

Sean Fleming, Adam K Leibovich

We present a theoretical prediction for the photon spectrum in radiative Upsilon decay. Parts of the spectrum have already been understood, but an understanding of the endpoint reg…

hep-ph2002★ 15 cited

SO(10) GUT Models and Their Present Success in Explaining Mass and Mixing Data

Carl H. Albright

Some features of SO(10) GUT models are reviewed, and a number of such models in the literature are compared. While some have been eliminated by recent neutrino data, others are pre…

hep-ex2002★ 8 cited

Beam Tests of Ionization Chambers for the NuMI Neutrino Beam

R. M. Zwaska, James Hall, Sacha E. Kopp +10

We have conducted tests at the Fermilab Booster of ionization chambers to be used as monitors of the NuMI neutrino beamline. The chambers were exposed to proton fluxes of up to 10$…

hep-ph2002★ 5 cited

Two-Loop Results for M_W in the Standard Model and the MSSM

Ayres Freitas, Sven Heinemeyer, Georg Weiglein

Recent higher-order results for the prediction of the W-boson mass, M_W, within the Standard Model are reviewed and an estimate of the remaining theoretical uncertainties of the el…

astro-ph2002★ 311 cited

The overdensities of galaxy environments as a function of luminosity and color

David W. Hogg, Michael R. Blanton, Daniel J. Eisenstein +9

We study the mean environments of galaxies in the Sloan Digital Sky Survey as a function of rest-frame luminosity and color. Overdensities in galaxy number are estimated in $8 h^{-…

astro-ph2002★ 116 cited

Average spectra of massive galaxies in the SDSS

Daniel J. Eisenstein, David W. Hogg, Masataka Fukugita +17

We combine Sloan Digital Sky Survey spectra of 22,000 luminous, red, bulge-dominated galaxies to get high S/N average spectra in the rest-frame optical and ultraviolet (2600A to 70…

hep-ex2002★ 18 cited

Measurements of the Decay KL->e+e-mu+mu-

The KTeV Collaboration

The KTeV experiment at Fermilab has isolated a total of 132 events from the rare decay KL->e+e-mu+mu-, with an estimated background of 0.8 events. The branching ratio of this mode…

hep-ph2002★ 60 cited

Exclusive Double-Charmonium Production from e^+ e^- Annihilation into Two Virtual Photons

Geoffrey T. Bodwin, Eric Braaten, Jungil Lee

We calculate the contributions from QED processes involving two virtual photons to the cross sections for e^+ e^- annihilation into two charmonium states with the same C-parity. Ge…

hep-ph2002★ 4 cited

Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t

S. H. Kettell, L. G. Landsberg, H. Nguyen

We estimate B(K -> pi nu nubar) in the context of the Standard Model by fitting for lambda_t = Vtd x V*ts of the `kaon unitarity triangle' relation. We fit data from epsilon_K, the…

hep-ph2002★ 144 cited

Opaque Branes in Warped Backgrounds

Marcela Carena, Eduardo Ponton, Tim Tait +1

We examine localized kinetic terms for gauge fields which can propagate into compact, warped extra dimensions. We show that these terms can have a relevant impact on the values of…

hep-ph2002★ 266 cited

Nonexotic Neutral Gauge Bosons

Thomas Appelquist, Bogdan A. Dobrescu, Adam R. Hopper

We study theoretical and experimental constraints on electroweak theories including a new color-singlet and electrically-neutral gauge boson. We first note that the electric charge…

astro-ph2002★ 133 cited

Neutrino Mass and Dark Energy from Weak Lensing

Kevork Abazajian, Scott Dodelson

Weak gravitational lensing of background galaxies by intervening matter directly probes the mass distribution in the universe. This distribution, and its evolution at late times, i…

hep-ex2002★ 59 cited

Search for Long-lived Charged Massive Particles in anti-p p Collisions at s**1/2 = 1.8 TeV

D. Acosta

We report a search for production of long-lived charged massive particles in a data sample of 90 pb^{-1} of \sqrt{s} = 1.8 TeV p anti-p collisions recorded by the Collider Detector…

astro-ph2002★ 49 cited

Environmental Enhancement of Loose Groups around Rich Clusters of Galaxies

M. Einasto, J. Einasto, V. Müller +2

We have studied the properties of Las Campanas Loose Groups in the neighbourhood of rich (Abell, APM and X-ray) clusters of galaxies. These loose groups show strong evidence of seg…

hep-ph2002★ 142 cited

Manifest CP Violation from Majorana Phases

Andre de Gouvea, Boris Kayser, Rabindra Mohapatra

We hunt for and discuss manifestly CP-violating effects which are mediated by Majorana phases. These phases are present if the Standard Model neutrinos are Majorana particles. We a…

hep-ph2002★ 36 cited

Implications of a Massless Neutralino for Neutrino Physics

I. Gogoladze, J. Lykken, C. Macesanu +1

We consider the phenomenological implications of a soft SUSY breaking term BN at the TeV scale (here B is the U(1)_Y gaugino and N is the right-handed neutrino field). In models wi…

hep-ex2002★ 15 cited

Beam Halo Monitoring at CDF

Muge Karagoz Unel, Richard J. Tesarek

Losses from the proton and antiproton beams of the Fermilab Tevatron have been shown to produce a halo which contribute to backgrounds to physics signals in the Collider Detector a…

hep-lat2002★ 43 cited

The Second Moment of the Pion Light Cone Wave Function

Luigi Del Debbio, Massimo Di Pierro, Alex Dougall

We present a preliminary result for second moment of the light cone wave function of the pion. This parameter is the subject of a discrepancy between theoretical predictions (comin…

hep-ph2002★ 38 cited

The Resummed Photon Spectrum in Radiative Upsilon Decays

Sean Fleming, Adam K. Leibovich

We present a theoretical prediction for the photon spectrum in radiative Upsilon decay including the effects of resumming the endpoint region, E_γ-> M_Υ/2. Our approach is based on…

physics.acc-ph2002★ 37 cited

Sub-picosecond compression by velocity bunching in a photo-injector

P. Piot, L. Carr, W. S. Graves +1

We present an experimental evidence of a bunch compression scheme that uses a traveling wave accelerating structure as a compressor. The bunch length issued from a laser-driven rad…